hip-33971

Its story

19 Monocerotis, listed in variable catalogues as V637 Monocerotis, is a blue star that pulses at the characteristic Beta Cephei rhythm —very fast oscillations of its entire surface—. It lies about 1,220 light-years away, in the quiet Unicorn, a modern constellation drawn in the 17th century across a stretch of sky poor in bright stars. Its blue heartbeat, invisible to the eye, is the silent pulse of a young, massive star.